Both are set equal at 0.2uS so that they are high and low for equal durations.

When there are many clock inputs required, inorder to see my output clearly,

I keep each clock with a different duration, usually in multiples.

eg: 0.1uS , 0.2uS , 0.4uS , 0.8S

STARTVAL - the starting value of the clock

Here, set as 0.

My Type #2: Fixed Value Clock Signal (ENABLE)

Here, I alter the OFFTIME and ONTIME by assigning one of them a value of 0uS

That way, it will remain in only one state: low or high.

Always 0:

Always 1:

Notice how the STARTVAL does not matter here.

My Type #3: Changing the Delay

In order to distinguish between the various input clock signals, I initially used delay instead of changing the ontime and offtime. They used to create excessive propagation delays which I found unfavorable.